Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss)	$ 168	$ 950	$ (2,570)
Reclassification out of Accumulated Other Comprehensive Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(1,569)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	168
Other comprehensive income (loss)	168
Balance, end of period	(1,401)	(1,569)
Forward Starting Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(1,569)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	168
Other comprehensive income (loss)	168
Balance, end of period	(1,401)	(1,569)
Defined Benefit Pension Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	0
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	0
Balance, end of period	$ 0	$ 0