Annual report pursuant to Section 13 and 15(d)

Stockholder's Equity - Roll Forward Activity (Details)

v3.7.0.1
Stockholder's Equity - Roll Forward Activity (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance $ 201,065,000 $ 257,566,000 $ 292,660,000
Ending Balance 214,945,000 201,065,000 257,566,000
Income tax on unrealized loss on derivatives arising during period 0 0 0
Unrealized Gains and Losses on Derivative Instruments, net      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (13,546,000) (4,805,000) 74,000
Gain (loss) through Accumulated other comprehensive income     (12,560,000)
Unrealized loss on derivatives recognized through Accumulated other comprehensive income (loss) (2,673,000) (16,041,000)  
Reclassification into net income 7,262,000 7,300,000 7,681,000
Ending Balance (8,957,000) (13,546,000) (4,805,000)
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (13,546,000) (4,805,000) 74,000
Gain (loss) through Accumulated other comprehensive income     (12,560,000)
Unrealized loss on derivatives recognized through Accumulated other comprehensive income (loss) (2,673,000) (16,041,000)  
Reclassification into net income 7,262,000 7,300,000 7,681,000
Ending Balance $ (8,957,000) $ (13,546,000) $ (4,805,000)